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Goodwill and Intangible Assets, Net (Tables)
9 Months Ended
Sep. 30, 2021
Goodwill and Intangible Assets Disclosure [Abstract]  
Schedule of Finite-Lived Intangible Assets
Acquired intangible assets consist of developed technology and customer relationships and are amortized on a straight-line basis over their estimated useful lives. The following tables summarize acquired intangible assets as of September 30, 2021 and December 31, 2020:

September 30, 2021
Gross AmountAccumulated AmortizationNet Carrying ValueWeighted Average Remaining Useful Life
(amounts in thousands)(in years)
Developed technology$10,496 $(8,157)$2,339 0.9
Customer relationships1,600 (954)646 1.7
Total$12,096 $(9,111)$2,985 
December 31, 2020
Gross AmountAccumulated AmortizationNet Carrying ValueWeighted Average Remaining Useful Life
(amounts in thousands)(in years)
Developed technology$10,496 $(5,218)$5,278 1.5
Customer relationships1,600 (655)945 2.4
Total$12,096 $(5,873)$6,223 
Summary of Estimated Future Amortization Expense
Expected future amortization expense related to acquired intangible assets is as follows (in thousands):
As of September 30,
Amortization Expense
2021 (remaining three months)$1,091 
20221,591 
2023303 
Total future amortization$2,985